packages/Python/lldbsuite/test/python_api/watchpoint/TestWatchpointIgnoreCount.py

   1 """
   2 Use lldb Python SBWatchpoint API to set the ignore count.
   3 """
   4
   5 from __future__ import print_function
   6
   7
   8
   9 import os, time
  10 import re
  11 import lldb
  12 from lldbsuite.test.decorators import *
  13 from lldbsuite.test.lldbtest import *
  14 from lldbsuite.test import lldbutil
  15
  16 class WatchpointIgnoreCountTestCase(TestBase):
  17
  18     mydir = TestBase.compute_mydir(__file__)
  19
  20     def setUp(self):
  21         # Call super's setUp().
  22         TestBase.setUp(self)
  23         # Our simple source filename.
  24         self.source = 'main.c'
  25         # Find the line number to break inside main().
  26         self.line = line_number(self.source, '// Set break point at this line.')
  27
  28     @add_test_categories(['pyapi'])
  29     @expectedFailureAndroid(archs=['arm', 'aarch64']) # Watchpoints not supported
  30     @expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr24446: WINDOWS XFAIL TRIAGE - Watchpoints not supported on Windows")
  31     @expectedFailureAll(archs=['s390x']) # Read-write watchpoints not supported on SystemZ
  32     def test_set_watch_ignore_count(self):
  33         """Test SBWatchpoint.SetIgnoreCount() API."""
  34         self.build()
  35         exe = os.path.join(os.getcwd(), "a.out")
  36
  37         # Create a target by the debugger.
  38         target = self.dbg.CreateTarget(exe)
  39         self.assertTrue(target, VALID_TARGET)
  40
  41         # Create a breakpoint on main.c in order to set our watchpoint later.
  42         breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
  43         self.assertTrue(breakpoint and
  44                         breakpoint.GetNumLocations() == 1,
  45                         VALID_BREAKPOINT)
  46
  47         # Now launch the process, and do not stop at the entry point.
  48         process = target.LaunchSimple (None, None, self.get_process_working_directory())
  49
  50         # We should be stopped due to the breakpoint.  Get frame #0.
  51         process = target.GetProcess()
  52         self.assertTrue(process.GetState() == lldb.eStateStopped,
  53                         PROCESS_STOPPED)
  54         thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
  55         frame0 = thread.GetFrameAtIndex(0)
  56
  57         # Watch 'global' for read and write.
  58         value = frame0.FindValue('global', lldb.eValueTypeVariableGlobal)
  59         error = lldb.SBError();
  60         watchpoint = value.Watch(True, True, True, error)
  61         self.assertTrue(value and watchpoint,
  62                         "Successfully found the variable and set a watchpoint")
  63         self.DebugSBValue(value)
  64
  65         # Hide stdout if not running with '-t' option.
  66         if not self.TraceOn():
  67             self.HideStdout()
  68
  69         # There should be only 1 watchpoint location under the target.
  70         self.assertTrue(target.GetNumWatchpoints() == 1)
  71         watchpoint = target.GetWatchpointAtIndex(0)
  72         self.assertTrue(watchpoint.IsEnabled())
  73         self.assertTrue(watchpoint.GetIgnoreCount() == 0)
  74         watch_id = watchpoint.GetID()
  75         self.assertTrue(watch_id != 0)
  76         print(watchpoint)
  77
  78         # Now immediately set the ignore count to 2.  When we continue, expect the
  79         # inferior to run to its completion without stopping due to watchpoint.
  80         watchpoint.SetIgnoreCount(2)
  81         print(watchpoint)
  82         process.Continue()
  83
  84         # At this point, the inferior process should have exited.
  85         self.assertTrue(process.GetState() == lldb.eStateExited, PROCESS_EXITED)
  86
  87         # Verify some vital statistics.
  88         self.assertTrue(watchpoint)
  89         self.assertTrue(watchpoint.GetWatchSize() == 4)
  90         self.assertTrue(watchpoint.GetHitCount() == 2)
  91         print(watchpoint)